The name on the guard may be "W. Stalter" as I look at it. There was a gunsmith named William Stalters who was working in Logan County, Ohio, about the time this gun was made. However, a name on the guard is a non-traditional place for a gunmaker to sign, so it could also be the gun owner's name. The BIG question is... is there any trace of a name or initials on the top barrel flat several inches behind the rear sight? That's where a gun like this would normally be signed by its maker. If anything is there, please post a good picture of it, even if hard to read, since someone here may be able to decipher what's left of it.
The Goulcher lock is a commercial hardware store lock, available almost anywhere and purchased by the gunsmith, so it has little bearing on where, or by whom, this gun was made.
Shelby Gallien